C
Explanation: cools the atmosphere they make water droplets to condense in air firing darker clouds to block light
The answer is B.the production of red blood cells, which transport oxygen, is triggered by a low level of oxygen in the blood.
Part 1:
The carbon-monoxide, carbon-dioxide, and other harmful gasses are being released into the environment by the factory causing the air to be polluted.
Part 2:
The factory is putting in mechanical work, so the energy coming out is mechanical energy which is being transformed into chemical energy in the form of harmful gases.
Part 3:
This process is a recycling of carbon in the carbon cycle because along with adding carbon-dioxide to the air, it also provides photosynthetic autotrophs with carbon-dioxide which is required for photosynthesis. This will then be turned into oxygen which is used for cellular respiration in animals.
Guard cell o is ordered to opening and closing of stomata.
Phosphate Backbone is teh dna sugar phosphate bases connect with each other.